who is babru vahana in this pic?

There is no Copyright by Smithsonian or anyone else because the artist has been dead more than 75 years.

great!so beautifully portrayed..............

The son of Arjuna by Chitrangada, and in this scene is presumably trying to get to the kingdom of Arjuna's other wife

Agreed!

Wonderful image!

No, @Anirudha Pandey. As a part of the deal with King Chitravahan (King of Manipur), Arjun had agreed to give his and Chitrangada's first born son to the King. When Arjun comes to Manipur with the horse of Yudhishthir's Ashvamedha Yajna, Prince Babhruvahan does not fight his father. Arjun challenges him that in keeping up the Kshatriya tradition, he ought to fight. This is the depiction of theta confrontation. (Consult Mahabharat Nmanaukramanika, by Dr, V.S. Agrawala, Geetapress Gorakhpur)

(y)

This feels very... familiar... somehow, though it's beneath the verbal level to translate into language (as yet)...

@Anuradha Pandey - Do you mean a confrontation with Uloopi's folks?

Sure, if you want to reiterate the entire story that's correct. What I said wasn't technically incorrect, by the way. He goes to nag lok in the quest to get the gem that can bring his father back to life after he accidentally kills him because he didn't realize Arjuna was his father.